在准备成人英语三级考试的过程中，语法部分往往是考生们最为关注的内容之一。掌握扎实的语法基础不仅有助于提高整体语言水平，还能在考试中取得更好的成绩。本文将提供一些针对成人英语三级考试的语法练习题，并附上详细的解析，帮助考生更好地理解和掌握相关知识点。

一、选择题

1. I ______ to the library yesterday, but I didn’t find any books on history.

A. go

B. went

C. have gone

D. had gone

2. She is not only a teacher ______ a writer.

A. and

B. but also

C. or

D. nor

3. The children were playing in the garden when it ______.

A. rains

B. rained

C. was raining

D. would rain

4. If I ______ you, I would take the job.

A. am

B. was

C. were

D. be

5. He has been working here ______ 2015.

A. since

B. for

C. from

D. in

二、填空题

6. I ______ (not finish) my homework yet.

7. She is the person ______ (who/whom) I met at the party.

8. We should try our best ______ (pass) the exam.

9. The book ______ (write) by a famous author is very popular.

10. By the time we arrived, the meeting ______ (start).

三、改错题

11. She don't like coffee.

12. He is more taller than his brother.

13. I have never saw that movie.

14. They are going to the park with their friend.

15. The teacher asked us to write a letter to our parents.

四、参考答案与解析

一、选择题答案：

1. B（过去时）

2. B（固定搭配 not only...but also）

3. C（过去进行时）

4. C（虚拟语气）

5. A（since 表示从某时间点开始）

二、填空题答案：

6. haven’t finished

7. whom

8. to pass

9. written

10. had started

三、改错题答案：

11. don’t → doesn’t

12. taller → tall（比较级不能用 more）

13. saw → seen

14. friend → friends

15. 正确（无错误）

通过系统的语法练习和反复的巩固，考生可以逐步提升自己的语言运用能力，为成人英语三级考试打下坚实的基础。建议考生在做题过程中注重理解语法规则的实际应用，同时结合阅读和写作来增强语感。希望以上练习题能够对大家的备考有所帮助！